package com.example.demo.dao;

import com.example.demo.pojo.Department;
import org.springframework.stereotype.Repository;

import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

//部门dao
@Repository
public class DepartmentDao {

    //模拟数据中的数据
    private static Map<Integer,Department> departments = null;

    static {
        //创建一个模拟部门表
        departments = new HashMap<>();
        //添加记录
        departments.put(101, new Department(101,"教学部"));
        departments.put(102, new Department(102,"市场部"));
        departments.put(103, new Department(103,"教研部"));
        departments.put(104, new Department(104,"运营部"));
        departments.put(105, new Department(105,"后勤部"));
    }

    //CRUD操作
    //获取所有部门信息
    public Collection<Department> getDepartments(){
        return departments.values();
    }

    //通过id得到部门
    public Department getDepartmentById(Integer id){
        return departments.get(id);
    }

}
